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  <title>Sets the normalized HSL color</title>
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  <div id="layout-content"><div id="imagickpixel.sethsl" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ImagickPixel::setHSL</h1>
  <p class="verinfo">(PECL imagick 2, PECL imagick 3)</p><p class="refpurpose"><span class="refname">ImagickPixel::setHSL</span> &mdash; <span class="dc-title">Sets the normalized HSL color</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-imagickpixel.sethsl-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>ImagickPixel::setHSL</strong></span>(<span class="methodparam"><span class="type">float</span> <code class="parameter">$hue</code></span>, <span class="methodparam"><span class="type">float</span> <code class="parameter">$saturation</code></span>, <span class="methodparam"><span class="type">float</span> <code class="parameter">$luminosity</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Sets the color described by the ImagickPixel object using normalized
   values for hue, saturation and luminosity.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-imagickpixel.sethsl-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">hue</code></dt>

     <dd>

      <p class="para">
       The normalized value for hue, described as a fractional arc
       (between 0 and 1) of the hue circle, where the zero value is
       red.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">saturation</code></dt>

     <dd>

      <p class="para">
       The normalized value for saturation, with 1 as full saturation.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">luminosity</code></dt>

     <dd>

      <p class="para">
       The normalized value for luminosity, on a scale from black at
       0 to white at 1, with the full HS value at 0.5 luminosity.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-imagickpixel.sethsl-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-imagickpixel.sethsl-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2977">
    <p><strong>示例 #1 Use <span class="function"><strong>ImagickPixel::setHSL()</strong></span> to modify a color</strong></p>
    <div class="example-contents">
        <div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #FF8000">//Create&nbsp;an&nbsp;almost&nbsp;pure&nbsp;red&nbsp;color<br /></span><span style="color: #0000BB">$color&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ImagickPixel</span><span style="color: #007700">(</span><span style="color: #DD0000">'rgb(90%,&nbsp;10%,&nbsp;10%)'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//Get&nbsp;it's&nbsp;HSL&nbsp;values<br /></span><span style="color: #0000BB">$colorInfo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$color</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getHSL</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">//Rotate&nbsp;the&nbsp;hue&nbsp;by&nbsp;180&nbsp;degrees<br /></span><span style="color: #0000BB">$newHue&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$colorInfo</span><span style="color: #007700">[</span><span style="color: #DD0000">'hue'</span><span style="color: #007700">]&nbsp;+&nbsp;</span><span style="color: #0000BB">0.5</span><span style="color: #007700">;<br />if&nbsp;(</span><span style="color: #0000BB">$newHue&nbsp;</span><span style="color: #007700">&gt;&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$newHue&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$newHue&nbsp;</span><span style="color: #007700">-&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">//Set&nbsp;the&nbsp;ImagickPixel&nbsp;to&nbsp;the&nbsp;new&nbsp;color<br /></span><span style="color: #0000BB">$colorInfo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$color</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setHSL</span><span style="color: #007700">(</span><span style="color: #0000BB">$newHue</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$colorInfo</span><span style="color: #007700">[</span><span style="color: #DD0000">'saturation'</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">$colorInfo</span><span style="color: #007700">[</span><span style="color: #DD0000">'luminosity'</span><span style="color: #007700">]);<br /><br /></span><span style="color: #FF8000">//Check&nbsp;that&nbsp;the&nbsp;new&nbsp;color&nbsp;is&nbsp;blue/green<br /></span><span style="color: #0000BB">$colorInfo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$color</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getcolor</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$colorInfo</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Array
(
    [r] =&gt; 26
    [g] =&gt; 230
    [b] =&gt; 230
    [a] =&gt; 255
)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-imagickpixel.sethsl-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    Available with ImageMagick library version 6.2.9 and higher.
   </p>
  </p></blockquote>
 </div>


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